The \x92FCT157T devices are quad two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S) input. The output-enable (E\) input is active low. When E\ is high, all of the outputs (Y) are forced low, regardless of all other input conditions.
Moving data from two groups of registers to four common output buses is a common use of the \x92FCT157T devices. The state of S determines the particular register from which the data comes. It also can be used as a function generator. These devices are useful for implementing highly irregular logic by generating any 4 of the 16 different functions of 2 variables, with 1 variable common.
The \x92FCT157T devices are logic implementations of a four-pole, two-position switch, where the position of the switch is determined by the logic levels at S.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Quad 2-Input Multiplexers With 3-State Outputs datasheet (Rev. B) | 02 Nov 2001 | |
| Selection guide | Logic Guide (Rev. AB) | 12 Jun 2017 | ||
| Application note | Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) | 02 Dec 2015 | ||
| User guide | LOGIC Pocket Data Book (Rev. B) | 16 Jan 2007 | ||
| Application note | Semiconductor Packing Material Electrostatic Discharge (ESD) Protection | 08 Jul 2004 | ||
| Application note | Selecting the Right Level Translation Solution (Rev. A) | 22 Jun 2004 | ||
| User guide | CYFCT Parameter Measurement Information | 02 Apr 2001 | ||
| Selection guide | Advanced Bus Interface Logic Selection Guide | 09 Jan 2001 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| LCCC (FK) | 20 | Ultra Librarian |
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